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NSString* string; // 结果字符串
NSString* string1, string2; //已存在的字符串，需要将string1和string2连接起来
//方法1.
string = [NSString initWithFormat:@"%@,%@", string1, string2 ];	 
//方法2.
string = [string1 stringByAppendingString:string2];
//方法3 .
string = [string stringByAppendingFormat:@"%@,%@",string1, string2];

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+ (UIColor*)colorWithHexString:(NSString*)stringToConvert{
    if([stringToConverthasPrefix:@"#"])
    {
        stringToConvert = [stringToConvertsubstringFromIndex:1];
    }
    NSScanner*scanner = [NSScannerscannerWithString:stringToConvert];
    unsignedhexNum;
    if(![scannerscanHexInt:&hexNum])
    {
        returnnil;

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// 1. 创建一个点击事件，点击时触发labelClick方法
UITapGestureRecognizer *labelTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(labelClick)];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 100)];

// 2. 将点击事件添加到label上
label addGestureRecognizer:labelTapGestureRecognizer];
label.userInteractionEnabled = YES; // 可以理解为设置label可被点击

// 3. 在此方法中设置点击label后要触发的操作

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    /*获取设备IPv4地址对应的字符串*/
    public static String getIpAddressString() {
        try {
            for (Enumeration<NetworkInterface> enNetI = NetworkInterface
                    .getNetworkInterfaces(); enNetI.hasMoreElements(); ) {
                NetworkInterface netI = enNetI.nextElement();
                for (Enumeration<InetAddress> enumIpAddr = netI
                        .getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (inetAddress instanceof Inet4Address && !inetAddress.isLoopbackAddress()) {

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pod install --verbose --no-repo-update
pod update --verbose --no-repo-update

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I use the first


—– BEGIN LICENSE —–
Michael Barnes
Single User License
EA7E-821385
8A353C41 872A0D5C DF9B2950 AFF6F667
C458EA6D 8EA3C286 98D1D650 131A97AB
AA919AEC EF20E143 B361B1E7 4C8B7F04

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>使用 `WebViewJavascriptBridge`库

 /*这段代码是固定的，必须要放到js中*/
      function setupWebViewJavascriptBridge(callback) {
        if (window.WebViewJavascriptBridge) { return callback(WebViewJavascriptBridge); }
        if (window.WVJBCallbacks) { return window.WVJBCallbacks.push(callback); }
        window.WVJBCallbacks = [callback];
        var WVJBIframe = document.createElement('iframe');
        WVJBIframe.style.display = 'none';
        WVJBIframe.src = 'wvjbscheme://__BRIDGE_LOADED__';

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//实时监控网络状态

- (void)KVONetworkChange {

[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {

switch (status) {

case AFNetworkReachabilityStatusUnknown:{

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//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.usage.UsageStats;
import android.app.usage.UsageStatsManager;
import android.content.Context;
import android.content.SharedPreferences;

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NSString *imgUrl = _dataArray[index][@"url"];  //下一张背景图url
UIImage *placeHolder = _baseImgView.image;     //使用上一张背景图作为placeholder
[_baseImgView sd_setImageWithURL:[NSURL URLWithString:imgUrl] placeholderImage:placeHolder completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
        if (image) 
            CATransition *transition = [CATransition animation];
            transition.type = kCATransitionFade;
            transition.duration = 1.0f;
            transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
            [_baseImgView.layer addAnimation:transition forKey:nil];