SDAutoLayout Documentation

用法一

_view.sd_layout
    .leftSpaceToView(self.view, 10)
    .topSpaceToView(self.view, 80)
    .heightIs(130)
    .widthRatioToView(self.view, 0.4);

用法二 （一行代码搞定，其实用法一也是一行代码）

_view.sd_layout.leftSpaceToView(self.view, 10).topSpaceToView(self.view,80).heightIs(130).widthRatioToView(self.view, 0.4);

综合示例

*******************************************************************************
        
        注意:先把需要自动布局的view加入父view然后在进行自动布局，例： 

        UIView *view0 = [UIView new];
        UIView *view1 = [UIView new];
        [self.view addSubview:view0];
        [self.view addSubview:view1];
        
        view0.sd_layout
        .leftSpaceToView(self.view, 10)
        .topSpaceToView(self.view, 80)
        .heightIs(100)
        .widthRatioToView(self.view, 0.4);
        
        view1.sd_layout
        .leftSpaceToView(view0, 10)
        .topEqualToView(view0)
        .heightRatioToView(view0, 1)
        .rightSpaceToView(self.view, 10);

    *******************************************************************************

// autoHeightRatio() 传0则根据文字自动计算高度（传大于0的值则根据此数值设置高度和宽度的比值）
    _label.sd_layout.autoHeightRatio(0);

1. >> 设置cell高度自适应：
    // cell布局设置好之后调用此方法就可以实现高度自适应（注意：如果用高度自适应则不要再以cell的底边为参照去布局其子view）

    [cell setupAutoHeightWithBottomView:_view4 bottomMargin:10];

2. >> 获取自动计算出的cell高度

    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        id model = self.modelsArray[indexPath.row];
        // 获取cell高度
        return [self.tableView cellHeightForIndexPath:indexPath model:model keyPath:@"model" cellClass:[DemoVC9Cell class]  contentViewWidth:cellContentViewWith];
    }

1. >> 设置cell高度自适应：
    // cell布局设置好之后调用此方法就可以实现高度自适应（注意：如果用高度自适应则不要再以cell的底边为参照去布局其子view）

    [cell setupAutoHeightWithBottomView:_view4 bottomMargin:10];

2. >> 获取自动计算出的cell高度 

    - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
    {
    // 获取cell高度
    return [self cellHeightForIndexPath:indexPath cellContentViewWidth:[UIScreen mainScreen].bounds.size.width];
    }

1.1 > leftSpaceToView(self.view, 10)
   
   方法名中带有“SpaceToView”的方法表示到某个参照view的间距，需要传递2个参数：（UIView）参照view 和 （CGFloat）间距数值

   1.2 > widthRatioToView(self.view, 1)
   
   方法名中带有“RatioToView”的方法表示view的宽度或者高度等属性相对于参照view的对应属性值的比例，需要传递2个参数：（UIView）参照view 和 （CGFloat）倍数
 
   1.3 > topEqualToView(view)
   
   方法名中带有“EqualToView”的方法表示view的某一属性等于参照view的对应的属性值，需要传递1个参数：（UIView）参照view
   
   1.4 > widthIs(100)
   
   方法名中带有“Is”的方法表示view的某一属性值等于参数数值，需要传递1个参数：（CGFloat）数值

pod 'AFNetworking', '~> 4.0'

dependencies: [
    .package(url: "https://github.com/AFNetworking/AFNetworking.git", .upToNextMajor(from: "4.0.0"))
]

github "AFNetworking/AFNetworking" ~> 4.0

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
    NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];
    return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
    NSLog(@"File downloaded to: %@", filePath);
}];
[downloadTask resume];

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];
NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else {
        NSLog(@"Success: %@ %@", response, responseObject);
    }
}];
[uploadTask resume];

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];
    } error:nil];

AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
              uploadTaskWithStreamedRequest:request
              progress:^(NSProgress * _Nonnull uploadProgress) {
                  // This is not called back on the main queue.
                  // You are responsible for dispatching to the main queue for UI updates
                  dispatch_async(dispatch_get_main_queue(), ^{
                      //Update the progress view
                      [progressView setProgress:uploadProgress.fractionCompleted];
                  });
              }
              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
                  if (error) {
                      NSLog(@"Error: %@", error);
                  } else {
                      NSLog(@"%@ %@", response, responseObject);
                  }
              }];

[uploadTask resume];

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];

NSURL *URL = [NSURL URLWithString:@"http://httpbin.org/get"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];

NSURLSessionDataTask *dataTask = [manager dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else {
        NSLog(@"%@ %@", response, responseObject);
    }
}];
[dataTask resume];

NSString *URLString = @"http://example.com";
NSDictionary *parameters = @{@"foo": @"bar", @"baz": @[@1, @2, @3]};

[[AFHTTPRequestSerializer serializer] requestWithMethod:@"GET" URLString:URLString parameters:parameters error:nil];

GET http://example.com?foo=bar&baz[]=1&baz[]=2&baz[]=3

[[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];

POST http://example.com/
Content-Type: application/x-www-form-urlencoded

foo=bar&baz[]=1&baz[]=2&baz[]=3

[[AFJSONRequestSerializer serializer] requestWithMethod:@"POST" URLString:URLString parameters:parameters error:nil];

POST http://example.com/
Content-Type: application/json

{"foo": "bar", "baz": [1,2,3]}

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    NSLog(@"Reachability: %@", AFStringFromNetworkReachabilityStatus(status));
}];

[[AFNetworkReachabilityManager sharedManager] startMonitoring];

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.securityPolicy.allowInvalidCertificates = YES; // not recommended for production

pod 'MJExtension'

github "CoderMJLee/MJExtension"

@objc(MJTester)
@objcMembers
class MJTester: NSObject {
    // make sure to use `dynamic` attribute for basic type & must use as Non-Optional & must set initial value
    dynamic var isSpecialAgent: Bool = false
    dynamic var age: Int = 0
    
    var name: String?
    var identifier: String?
}

typedef enum {
    SexMale,
    SexFemale
} Sex;

@interface User : NSObject
@property (copy, nonatomic) NSString *name;
@property (copy, nonatomic) NSString *icon;
@property (assign, nonatomic) unsigned int age;
@property (copy, nonatomic) NSString *height;
@property (strong, nonatomic) NSNumber *money;
@property (assign, nonatomic) Sex sex;
@property (assign, nonatomic, getter=isGay) BOOL gay;
@end

/***********************************************/

NSDictionary *dict = @{
    @"name" : @"Jack",
    @"icon" : @"lufy.png",
    @"age" : @20,
    @"height" : @"1.55",
    @"money" : @100.9,
    @"sex" : @(SexFemale),
    @"gay" : @"true"
//   @"gay" : @"1"
//   @"gay" : @"NO"
};

// JSON -> User
User *user = [User mj_objectWithKeyValues:dict];

NSLog(@"name=%@, icon=%@, age=%zd, height=%@, money=%@, sex=%d, gay=%d", user.name, user.icon, user.age, user.height, user.money, user.sex, user.gay);
// name=Jack, icon=lufy.png, age=20, height=1.550000, money=100.9, sex=1

// 1.Define a JSONString
NSString *jsonString = @"{\"name\":\"Jack\", \"icon\":\"lufy.png\", \"age\":20}";

// 2.JSONString -> User
User *user = [User mj_objectWithKeyValues:jsonString];

// 3.Print user's properties
NSLog(@"name=%@, icon=%@, age=%d", user.name, user.icon, user.age);
// name=Jack, icon=lufy.png, age=20

@interface Status : NSObject
@property (copy, nonatomic) NSString *text;
@property (strong, nonatomic) User *user;
@property (strong, nonatomic) Status *retweetedStatus;
@end

/***********************************************/

NSDictionary *dict = @{
    @"text" : @"Agree!Nice weather!",
    @"user" : @{
        @"name" : @"Jack",
        @"icon" : @"lufy.png"
    },
    @"retweetedStatus" : @{
        @"text" : @"Nice weather!",
        @"user" : @{
            @"name" : @"Rose",
            @"icon" : @"nami.png"
        }
    }
};

// JSON -> Status
Status *status = [Status mj_objectWithKeyValues:dict];

NSString *text = status.text;
NSString *name = status.user.name;
NSString *icon = status.user.icon;
NSLog(@"text=%@, name=%@, icon=%@", text, name, icon);
// text=Agree!Nice weather!, name=Jack, icon=lufy.png

NSString *text2 = status.retweetedStatus.text;
NSString *name2 = status.retweetedStatus.user.name;
NSString *icon2 = status.retweetedStatus.user.icon;
NSLog(@"text2=%@, name2=%@, icon2=%@", text2, name2, icon2);
// text2=Nice weather!, name2=Rose, icon2=nami.png

/* Detailed source-code truncated for AI context efficiency. */

/* Detailed source-code truncated for AI context efficiency. */

NSArray *dictArray = @[
                         @{
                             @"name" : @"Jack",
                             @"icon" : @"lufy.png"
                         },
                         @{
                             @"name" : @"Rose",
                             @"icon" : @"nami.png"
                         }
                     ];

// JSON array -> User array
NSArray *userArray = [User mj_objectArrayWithKeyValuesArray:dictArray];

// Printing
for (User *user in userArray) {
    NSLog(@"name=%@, icon=%@", user.name, user.icon);
}
// name=Jack, icon=lufy.png
// name=Rose, icon=nami.png

// New model
User *user = [[User alloc] init];
user.name = @"Jack";
user.icon = @"lufy.png";

Status *status = [[Status alloc] init];
status.user = user;
status.text = @"Nice mood!";

// Status -> JSON
NSDictionary *statusDict = status.mj_keyValues;
NSLog(@"%@", statusDict);
/*
 {
 text = "Nice mood!";
 user =     {
 icon = "lufy.png";
 name = Jack;
 };
 }
 */

// More complex situation
Student *stu = [[Student alloc] init];
stu.ID = @"123";
stu.oldName = @"rose";
stu.nowName = @"jack";
stu.desc = @"handsome";
stu.nameChangedTime = @"2018-09-08";

Bag *bag = [[Bag alloc] init];
bag.name = @"a red bag";
bag.price = 205;
stu.bag = bag;

NSDictionary *stuDict = stu.mj_keyValues;
NSLog(@"%@", stuDict);
/*
{
    ID = 123;
    bag =     {
        name = "\U5c0f\U4e66\U5305";
        price = 205;
    };
    desc = handsome;
    nameChangedTime = "2018-09-08";
    nowName = jack;
    oldName = rose;
}
 */

// New model array
User *user1 = [[User alloc] init];
user1.name = @"Jack";
user1.icon = @"lufy.png";

User *user2 = [[User alloc] init];
user2.name = @"Rose";
user2.icon = @"nami.png";

NSArray *userArray = @[user1, user2];

// Model array -> JSON array
NSArray *dictArray = [User mj_keyValuesArrayWithObjectArray:userArray];
NSLog(@"%@", dictArray);
/*
 (
 {
 icon = "lufy.png";
 name = Jack;
 },
 {
 icon = "nami.png";
 name = Rose;
 }
 )
 */

func json2CoreDataObject() {
    context.performAndWait {
        let object = MJCoreDataTester.mj_object(withKeyValues: Values.testJSONObject, context: context)
        // use the object
    }
}

func coreDataObject2JSON() {
    context.performAndWait {        
        let dict = coreDataObject.mj_keyValues()
        // use dict
    }
}

#import "MJExtension.h"

@implementation MJBag
// NSCoding Implementation
MJCodingImplementation
@end

/***********************************************/

// what properties not to be coded
[MJBag mj_setupIgnoredCodingPropertyNames:^NSArray *{
    return @[@"name"];
}];
// Equals: MJBag.m implements +mj_ignoredCodingPropertyNames method.

// Create model
MJBag *bag = [[MJBag alloc] init];
bag.name = @"Red bag";
bag.price = 200.8;

NSString *file = [NSHomeDirectory() stringByAppendingPathComponent:@"Desktop/bag.data"];
// Encoding by archiving
[NSKeyedArchiver archiveRootObject:bag toFile:file];

// Decoding by unarchiving
MJBag *decodedBag = [NSKeyedUnarchiver unarchiveObjectWithFile:file];
NSLog(@"name=%@, price=%f", decodedBag.name, decodedBag.price);
// name=(null), price=200.800000

@import MJExtension;

// NSSecureCoding Implementation
MJSecureCodingImplementation(MJBag, YES)

@implementation MJBag
@end

 /***********************************************/

// what properties not to be coded
[MJBag mj_setupIgnoredCodingPropertyNames:^NSArray *{
    return @[@"name"];
}];
// Equals: MJBag.m implements +mj_ignoredCodingPropertyNames method.

// Create model
MJBag *bag = [[MJBag alloc] init];
bag.name = @"Red bag";
bag.price = 200.8;
bag.isBig = YES;
bag.weight = 200;

NSString *file = [NSTemporaryDirectory() stringByAppendingPathComponent:@"bag.data"];

NSError *error = nil;
// Encoding by archiving
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:bag requiringSecureCoding:YES error:&error];
[data writeToFile:file atomically:true];

// Decoding by unarchiving
NSData *readData = [NSFileManager.defaultManager contentsAtPath:file];
error = nil;
MJBag *decodedBag = [NSKeyedUnarchiver unarchivedObjectOfClass:MJBag.class fromData:readData error:&error];
MJExtensionLog(@"name=%@, price=%f", decodedBag.name, decodedBag.price);

// Dog
#import "MJExtension.h"

@implementation Dog
+ (NSString *)mj_replacedKeyFromPropertyName121:(NSString *)propertyName
{
    // nickName -> nick_name
    return [propertyName mj_underlineFromCamel];
}
@end

// NSDictionary
NSDictionary *dict = @{
                       @"nick_name" : @"旺财",
                       @"sale_price" : @"10.5",
                       @"run_speed" : @"100.9"
                       };
// NSDictionary -> Dog
Dog *dog = [Dog mj_objectWithKeyValues:dict];

// printing
NSLog(@"nickName=%@, scalePrice=%f runSpeed=%f", dog.nickName, dog.salePrice, dog.runSpeed);

// Book
#import "MJExtension.h"

@implementation Book
- (id)mj_newValueFromOldValue:(id)oldValue property:(MJProperty *)property
{
    if ([property.name isEqualToString:@"publisher"]) {
        if (oldValue == nil) return @"";
    } else if (property.type.typeClass == [NSDate class]) {
        NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
        fmt.dateFormat = @"yyyy-MM-dd";
        return [fmt dateFromString:oldValue];
    }

    return oldValue;
}
@end

// NSDictionary
NSDictionary *dict = @{
                       @"name" : @"5分钟突破iOS开发",
                       @"publishedTime" : @"2011-09-10"
                       };
// NSDictionary -> Book
Book *book = [Book mj_objectWithKeyValues:dict];

// printing
NSLog(@"name=%@, publisher=%@, publishedTime=%@", book.name, book.publisher, book.publishedTime);

- (void)mj_objectDidConvertToKeyValues:(NSMutableDictionary *)keyValues {
    // NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    // formatter.dateFormat = @"yyy-MM-dd";
    // should use sharedFormatter for better performance  
    keyValues[@"publishedTime"] = [sharedFormatter stringFromDate:self.publishedTime];
}

MJRefreshConfig.default.language = "zh-hans"

MJRefreshConfig.default.i18nFilename = "i18n File Name(not include type<.strings>)"

MJRefreshConfig.default.i18nBundle = <i18n Bundle>

// must use this localization methods
Bundle.mj_localizedString(forKey: "")
// or
Bundle.mj_localizedString(forKey: "", value:"")

override func i18nDidChange() {
    // Reset texts function
    setupTexts()
    // Make sure to call super after resetting texts. It will call placeSubViews for applying new layout.
    super.i18nDidChange()
}

// Example as MJRefreshNormalHeader
  func addRefreshHeader() {
      MJRefreshNormalHeader { [weak self] in
  	  // load some data
      }.autoChangeTransparency(true)
      .link(to: tableView)
  }

Base                        Custom
MJRefresh.bundle            MJRefresh.h
MJRefreshConst.h            MJRefreshConst.m
UIScrollView+MJExtension.h  UIScrollView+MJExtension.m
UIScrollView+MJRefresh.h    UIScrollView+MJRefresh.m
UIView+MJExtension.h        UIView+MJExtension.m

/** The Base Class of refresh control */
@interface MJRefreshComponent : UIView
#pragma mark -  Control the state of Refresh 

/** BeginRefreshing */
- (void)beginRefreshing;
/** EndRefreshing */
- (void)endRefreshing; 
/** IsRefreshing */
- (BOOL)isRefreshing;

#pragma mark - Other
/** According to the drag ratio to change alpha automatically */
@property (assign, nonatomic, getter=isAutomaticallyChangeAlpha) BOOL automaticallyChangeAlpha;
@end

@interface MJRefreshHeader : MJRefreshComponent
/** Creat header */
+ (instancetype)headerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock;
/** Creat header */
+ (instancetype)headerWithRefreshingTarget:(id)target refreshingAction:(SEL)action;

/** This key is used to storage the time that the last time of drown-down successfully */
@property (copy, nonatomic) NSString *lastUpdatedTimeKey;
/** The last time of drown-down successfully */
@property (strong, nonatomic, readonly) NSDate *lastUpdatedTime;

/** Ignored scrollView contentInset top */
@property (assign, nonatomic) CGFloat ignoredScrollViewContentInsetTop;
@end

@interface MJRefreshFooter : MJRefreshComponent
/** Creat footer */
+ (instancetype)footerWithRefreshingBlock:(MJRefreshComponentRefreshingBlock)refreshingBlock;
/** Creat footer */
+ (instancetype)footerWithRefreshingTarget:(id)target refreshingAction:(SEL)action;

/** NoticeNoMoreData */
- (void)noticeNoMoreData;
/** ResetNoMoreData（Clear the status of NoMoreData ） */
- (void)resetNoMoreData;

/** Ignored scrollView contentInset bottom */
@property (assign, nonatomic) CGFloat ignoredScrollViewContentInsetBottom;
@end

@interface MJRefreshAutoFooter : MJRefreshFooter
/** Is Automatically Refresh(Default is Yes) */
@property (assign, nonatomic, getter=isAutomaticallyRefresh) BOOL automaticallyRefresh;

/** When there is much at the bottom of the control is automatically refresh(Default is 1.0，Is at the bottom of the control appears in full, will refresh automatically) */
@property (assign, nonatomic) CGFloat triggerAutomaticallyRefreshPercent;
@end

@interface MJRefreshTrailer : MJRefreshComponent

/** 创建trailer */
+ (instancetype)trailerWithRefreshingBlock:(MJRefreshComponentAction)refreshingBlock;
/** 创建trailer */
+ (instancetype)trailerWithRefreshingTarget:(id)target refreshingAction:(SEL)action;

/** 忽略多少scrollView的contentInset的right */
@property (assign, nonatomic) CGFloat ignoredScrollViewContentInsetRight;

@end

* Due to there are more functions of this framework，Don't write specific text describe its usage
* You can directly reference examples MJTableViewController、MJCollectionViewController、MJWebViewController，More intuitive and fast.

self.tableView.mj_header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
   //Call this Block When enter the refresh status automatically 
}];
或
// Set the callback（Once you enter the refresh status，then call the action of target，that is call [self loadNewData]）
self.tableView.mj_header = [MJRefreshNormalHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];

// Enter the refresh status immediately
[self.tableView.mj_header beginRefreshing];

// Set the callback（一Once you enter the refresh status，then call the action of target，that is call [self loadNewData]）
MJRefreshGifHeader *header = [MJRefreshGifHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];
// Set the ordinary state of animated images
[header setImages:idleImages forState:MJRefreshStateIdle];
// Set the pulling state of animated images（Enter the status of refreshing as soon as loosen）
[header setImages:pullingImages forState:MJRefreshStatePulling];
// Set the refreshing state of animated images
[header setImages:refreshingImages forState:MJRefreshStateRefreshing];
// Set header
self.tableView.mj_header = header;

// Hide the time
header.lastUpdatedTimeLabel.hidden = YES;

// Hide the time
header.lastUpdatedTimeLabel.hidden = YES;

// Hide the status
header.stateLabel.hidden = YES;

// Set title
[header setTitle:@"Pull down to refresh" forState:MJRefreshStateIdle];
[header setTitle:@"Release to refresh" forState:MJRefreshStatePulling];
[header setTitle:@"Loading ..." forState:MJRefreshStateRefreshing];

// Set font
header.stateLabel.font = [UIFont systemFontOfSize:15];
header.lastUpdatedTimeLabel.font = [UIFont systemFontOfSize:14];

// Set textColor
header.stateLabel.textColor = [UIColor redColor];
header.lastUpdatedTimeLabel.textColor = [UIColor blueColor];

self.tableView.mj_header = [MJDIYHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];
// Implementation reference to MJDIYHeader.h和MJDIYHeader.m

self.tableView.mj_footer = [MJRefreshAutoNormalFooter footerWithRefreshingBlock:^{
    //Call this Block When enter the refresh status automatically
}];
或
// Set the callback（Once you enter the refresh status，then call the action of target，that is call [self loadMoreData]）
self.tableView.mj_footer = [MJRefreshAutoNormalFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreData)];

// Set the callback（Once you enter the refresh status，then call the action of target，that is call [self loadMoreData]）
MJRefreshAutoGifFooter *footer = [MJRefreshAutoGifFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreData)];

// Set the refresh image
[footer setImages:refreshingImages forState:MJRefreshStateRefreshing];

// Set footer
self.tableView.mj_footer = footer;

// Hide the title of refresh status
footer.refreshingTitleHidden = YES;
// If does have not above method，then use footer.stateLabel.hidden = YES;

//Become the status of NoMoreData
[footer noticeNoMoreData];

// Set title
[footer setTitle:@"Click or drag up to refresh" forState:MJRefreshStateIdle];
[footer setTitle:@"Loading more ..." forState:MJRefreshStateRefreshing];
[footer setTitle:@"No more data" forState:MJRefreshStateNoMoreData];

// Set font
footer.stateLabel.font = [UIFont systemFontOfSize:17];

// Set textColor
footer.stateLabel.textColor = [UIColor blueColor];

//Hidden current control of the pull to refresh
self.tableView.mj_footer.hidden = YES;

self.tableView.mj_footer = [MJRefreshBackNormalFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreData)];

MJRefreshBackGifFooter *footer = [MJRefreshBackGifFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreData)];

// Set the normal state of the animated image
[footer setImages:idleImages forState:MJRefreshStateIdle];
//  Set the pulling state of animated images（Enter the status of refreshing as soon as loosen）
[footer setImages:pullingImages forState:MJRefreshStatePulling];
// Set the refreshing state of animated images
[footer setImages:refreshingImages forState:MJRefreshStateRefreshing];

// Set footer
self.tableView.mj_footer = footer;

self.tableView.mj_footer = [MJDIYAutoFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreData)];
// Implementation reference to MJDIYAutoFooter.h和MJDIYAutoFooter.m

self.tableView.mj_footer = [MJDIYBackFooter footerWithRefreshingTarget:self refreshingAction:@selector(loadMoreData)];
// Implementation reference to MJDIYBackFooter.h和MJDIYBackFooter.m

// The drop-down refresh
self.collectionView.mj_header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
   //Call this Block When enter the refresh status automatically 
}];

// The pull to refresh
self.collectionView.mj_footer = [MJRefreshAutoNormalFooter footerWithRefreshingBlock:^{
   //Call this Block When enter the refresh status automatically
}];

// The trailer refresh
self.collectionView.mj_trailer = [MJRefreshNormalTrailer trailerWithRefreshingBlock:^{
   //Call this Block When enter the refresh status automatically 
}];

//Add the control of The drop-down refresh
self.webView.scrollView.mj_header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
   //Call this Block When enter the refresh status automatically
}];