canlanyangg的博客

property(nonatomic,copy)NSString *name;很简单,假如有一个NSMutableString,现在用他给一个retain修饰 NSString赋值,那么只是将NSString指向了NSMutableString所指向的位置,并对NSMUtbaleString计数器加一,此时,如果对NSMutableString进行修改,也会导致NSString的值修改,原

Xcode8.3 编译时会遇到 如下图问题解决方式如下：1，Build Active Architecture Only: Debug = YES, Release = NOBitcode enabled = NO,2，清除缓存3，

iOS 10.3 开放了更换 app 图标的 API，核心方法是下面这个：[[UIApplication sharedApplication] setAlternateIconName:@"blackBgColor" completionHandler:^(NSError * _Nullable error) {                    NSLog(@"set icon er

- (void)addSetPayPwdListener:(UIWebView *)webView{    NSArray *valueArray = [valueDictionary objectForKey:@"setPayPwd"];        NSString *pwdId1 = valueArray[0];    NSString *pwdId2 = valueArr

framework里有解析html的功能所以需要导入libxml2.tbdframework里有压缩解压缩的功能所以需要导入libz.1.tbdframework里有categroy所以在building-Other Linker Flages 设置 -ObjC

http://www.jianshu.com/p/324c2fded696

+ (UIViewController *)getCurrentViewController {    UIViewController *result = nil;    UIWindow * window = [[UIApplication sharedApplication] keyWindow];    //app默认windowLevel是UIWindowLevelNorma

1，根据图片url下载图片/** 根据网络图片，得到群组头像如果是网络图片，需要先把图片下载好。 @param URLArray 头像地址 @param bgColor 图片填充色 @return 群组头像 */+ (UIImage *)groupImageWithURLS:(NSArray *)URLArray backgroundColor:(UIC

#import //_____________________________________________________________/@interface SSGridPwdTF : UITextField@end//_____________________________________________________________/

NSString *str = nil; if (@available(iOS 11.0, *)) { str = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/us/app/twitter/id%@?mt=8&action=write-review", AppStoreAppID]; } els

转载自：https://blog.youkuaiyun.com/dkq972958298/article/details/52954195Safari： http://maps： http://maps.google.comPhone： tel:SMS： sms:Mail： mailto:iBooks： ibooks://App Store： http://itunes.apple.comiTunes： ht...

https://juejin.im/entry/596330ae6fb9a06bc86e5ed6/

CGFloat sectionHeaderHeight = 37;    CGFloat sectionFooterHeight = 50;    CGFloat offsetY = scrollView.contentOffset.y;    if (offsetY >= 0 && offsetY     {        scrollView.contentInset =

ios8.2  以下代码会崩溃 [self.navigationController popViewControllerAnimated:YES];[((AppDelegate *)YLBApp).tabbar setSelectedIndex:selectedIndex];应改为  [self.navigationController popViewControllerA

@property int count; 相当于在.h中定义（声明）了一个方法- (int)count;  @synthesize count ;相当于在.m中实现了一个方法-(int)count{    return count;}

@implementation NSURLRequest (YLBIgnoreSSL)+ (BOOL)allowsAnyHTTPSCertificateForHost:(NSString *)host{    return YES;}@end

http://www.cocoachina.com/ios/20161027/17869.html步骤如下：代码上传Github创建podspec文件，并验证是否通过在Github上创建release版本注册CocoaPods账号上传代码到CocoaPods检查上传是否成功详细步骤如下：

- (void)removeRoute:(NSString *)routePattern{     NSInteger routeIndex = NSNotFound;    NSInteger index = 0;        for (JLRRouteDefinition *route in [self.routes copy]) {        if ([rout

jspatch  不支持宏定义，枚举在block里调用self要先定义变量 var slf = self;

info.plist 中加入一项 Application uses Wi-Fi，值为YES

-(void)paramToVc:(UIViewController *) v param:(NSDictionary *)parameters{    //        runtime将参数传递至需要跳转的控制器    unsigned int outCount = 0;    objc_property_t * properties = class_copyPropertyLis

webview的缓存策略，其实就是 NSURLRequest的缓存策略，有以下几种NSURLRequestUseProtocolCachePolicy               //默认值  有缓存，如果网络失败则取缓存数据NSURLRequestReloadIgnoringLocalCacheData   //忽略缓存数据NSURLRequestReturnCacheDat

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadDdataConnect) name:kloginSuccess object:nil];[[NSNotificationCenter defaultCenter] removeObserver:self];

automaticallyAdjustsScrollViewInsets = YES 根据所在界面的status bar，navigationbar，与tabbar的高度，自动调整scrollview的 inset设置为no，不让viewController调整，我们自己修改布局即可

CGFloat sectionHeaderHeight = 40;    if (scrollView.contentOffset.y=0) {        scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);    } else if (scrollView.content

////  NSData+CRC16.h//  CRC16_iOS////  Created by Echo on 16/3/21.//  Copyright © 2016年 Liu Xuanyi. All rights reserved.//#import <Foundation/Foundation.h>@interface NSData (CRC16)//...