电影票样式的层次感
https://github.com/PageGuo/NewPagedFlowView
滚动
image.png
设置图片上的按钮可以点击
imgView.userInteractionEnabled = YES;
/*** 原生post请求
NSString *path = @"http://v.juhe.cn/joke/randJoke.php";
NSURL *url = [NSURL URLWithString:path];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
//设置请求方式为POST
[request setHTTPMethod:@"POST"];
//请求内容写在 请求体内
[request setHTTPBody:[@"key=8d0bde7167db666ac160191217840b5b&type=pic" dataUsingEncoding:NSUTF8StringEncoding]];
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"%@",dic);
}];
[task resume];
***/
文字图片自适应
https://github.com/gsdios/SDAutoLayout
手机电池白色
- (UIStatusBarStyle)preferredStatusBarStyle{
return UIStatusBarStyleLightContent;
}
button传递多个参数
objc_setAssociatedObject(aBt, "firstObject", @"参数1", OBJC_ASSOCIATION_RETAIN_NONATOMIC);
objc_setAssociatedObject(aBt, "secondObject", @"参数2", OBJC_ASSOCIATION_RETAIN_NONATOMIC);
使用
objc_getAssociatedObject(sender, "firstObject");
objc_getAssociatedObject(sender, "secondObject")
生成图标
https://icon.wuruihong.com/
手机通讯录
https://github.com/hackxhj/BeautyAddressBook
身份证识别
https://github.com/zhongfenglee/IDCardRecognition
NSUserDefaults
[[NSUserDefaults standardUserDefaults]setObject:tempDic forKey:@"param"];
NSLog(@"%@",[[NSUserDefaults standardUserDefaults]valueForKey:@"param"]);
大次数循环内存暴涨问题 典型的例题如下
for (int i = 0; i < 100000; i++) {
NSString *string = @"Abc";
string = [string lowercaseString];
string = [string stringByAppendingString:@"xyz"];
NSLog(@"%@", string);
}
该循环内产生大量的临时对象，直至循环结束才释放，可能导致内存泄漏，解决方法为在循环中创建自己的autoReleasePool，及时释放占用内存大的临时变量，减少内存占用峰值。
for (int i = 0; i < 100000; i++) {
@autoreleasepool {
NSString *string = @"Abc";
string = [string lowercaseString];
string = [string stringByAppendingString:@"xyz"];
NSLog(@"%@", string);
}
}
播放语音 mp3
//从budle路径下读 这个文件名是你的歌曲名字,mp3是你的音频格式
NSString *string = [[NSBundle mainBundle] pathForResource:@"abc" ofType:@"mp3"];
//把音频文件转换成url格式
NSURL *url = [NSURL fileURLWithPath:string];
//初始化音频类 并且添加播放文件
avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
//设置代理
avAudioPlayer.delegate = self;
//设置初始音量大小
//avAudioPlayer.volume = 1;
//设置音乐播放次数 -1为一直循环
avAudioPlayer.numberOfLoops = -1;
[avAudioPlayer play];
view添加翻页动画动画
CATransition *animation = [CATransition animation];
animation.duration = 0.7f;
animation.type = @"pageCurl";
animation.subtype = kCATransitionFromLeft;
animation.timingFunction = UIViewAnimationOptionCurveEaseInOut;
[self.sxssScrollView.layer addAnimation:animation forKey:@"animation"];
最近做项目发现app 首页push一个界面，返回的时候，tabBar上的图标和文字出现一个从上往下的神奇动画, 经过测试发现，如果使用系统OS12.1 UINavigationController + UITabBarController，在popViewControllerAnimated 会遇到tabbar布局错乱的问题：
这个问题是 iOS 12.1 Beta 2 引入的问题，只要 UITabBar 是磨砂的，并且 push viewController 时 hidesBottomBarWhenPushed = YES 则手势返回的时候就会触发，出现这个现象的直接原因是 tabBar 内的按钮 UITabBarButton 被设置了错误的 frame，frame.size 变为 (0, 0) 导致的。
所以最简单的解决方案就是：
[UITabBar appearance].translucent = NO;
button设置文字对齐方式
button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;button.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
首先，这里使用button.titleLabel.textAlignment = NSTextAlignmentLeft; 这行代码是没有效果的，这只是让标签中的文本左对齐，但并没有改变标签在按钮中的对齐方式。所以我们使用button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft; 这行代码，把按钮的内容（控件）的对齐方式修改为水平左对齐，但是这们会紧紧靠着左边，不好看，所以我们还可以修改属性：button.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);这行代码可以让按钮的内容（控件）距离左边10个像素，这样就好看多了。
基础知识
http://www.cocoachina.com/ios/20180531/23592.html?utm_source=tuicool&utm_medium=referral
富文本
UILabel *testLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 100, [[UIScreen mainScreen] bounds].size.width, 30)];
testLabel.textAlignment = NSTextAlignmentCenter;
NSMutableAttributedString *AttributedStr = [[NSMutableAttributedString alloc]initWithString:@"猴年大吉,新春快乐!"];
[AttributedStr addAttribute:NSFontAttributeName
value:[UIFont systemFontOfSize:26.0]
range:NSMakeRange(2, 2)];
[AttributedStr addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:NSMakeRange(2, 2)];
[AttributedStr addAttribute:NSBackgroundColorAttributeName
value:[UIColor redColor]
range:NSMakeRange(7, 2)];
testLabel.attributedText = AttributedStr;
[self.view addSubview:testLabel];
文字加粗
[UILabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:20]];
加粗并且倾斜
[UILabel setFont:[UIFont fontWithName:@"Helvetica-BoldOblique" size:20]];
渐变色
UIView *colorView = [[UIView alloc] init];
[colorView setFrame:CGRectMake(20, 160,
self.view.frame.size.width - 40, self.view.frame.size.height - 320)];
[self.view addSubview:colorView];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = colorView.bounds;
gradient.colors = [NSArray arrayWithObjects:
(id)[UIColor colorWithRed:0 green:143/255.0 blue:234/255.0 alpha:1.0].CGColor,
(id)[UIColor colorWithRed:0 green:173/255.0 blue:234/255.0 alpha:1.0].CGColor,
(id)[UIColor whiteColor].CGColor, nil];
[colorView.layer addSublayer:gradient];
设置提示框取消 确定颜色
[cancel setValue:getColor(@"141414") forKey:@"titleTextColor"];
dismissViewControllerAnimated到根视图
如果是在Controller中 则代码如下
-(void)backClick{
UIViewController *vc = self;
while (vc.presentingViewController) {
vc = vc.presentingViewController;
}
[vc dismissViewControllerAnimated:YES completion:nil];
}
如果实在视图(View)中 则代码如下
-(void)backClick{
UIViewController *vc = [self viewController];
while (vc.presentingViewController) {
vc = vc.presentingViewController;
}
[vc dismissViewControllerAnimated:YES completion:nil];
}
/** 获取当前view的controller */
- (UIViewController *)viewController
{
for (UIView *next = [self superview]; next; next = next.superview) {
UIResponder *nextResponser = [next nextResponder];
if ([nextResponser isKindOfClass:[UIViewController class]]) {
return (UIViewController *)nextResponser;
}
}
return nil;
}