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一、关于四个容易混淆属性的对比说明
1. textAligment : 文字的水平方向的对齐方式
（1） 取值
NSTextAlignmentLeft = 0, // 左对齐
NSTextAlignmentCenter = 1, // 居中对齐
NSTextAlignmentRight = 2, // 右对齐
（2） ...
@interface MJScrollView () {
CGPoint _lastOffset;
}
@end
@implementation MJScrollView
#pragma mark - 生命周期方法
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self initial];
}
return self;
}
- (id)init {
if (self = [super init]) {
...
#pragma mark - 生命周期方法
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self initial];
}
return self;
}
- (id)init {
if (self = [super init]) {
[self initial];
}
return self;
}
#pragma mark 当MJScrollView从xib中创建完毕后会调用这个方法 ...
+ (void)showError:(NSString *)error toView:(UIView *)view{
// 快速显示一个提示信息
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:view animated:YES];
hud.labelText = error;
// 设置图片
hud.customView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"alert_failed_icon.png" ...
1. 如果只是想把当前页面的状态栏隐藏的话，直接用下面的代码就可以了
[[UIApplication sharedApplication] setStatusBarHidden:TRUE];
2. 如果是想把整个应用程序的状态栏都隐藏掉，操作如下：
在info.plist上添加一项：Status bar is initially hidden，value为YES；
完后在MainAppDelegate.mm的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptio ...
作为iOS 开发者，常遇到一个诡异的上传问题。 好不容易上传了一个app， 第一时间收到的邮件不是 ready for sale ，而是 “The PNG icon file Icon@2x.png appears to be corrupt”. 内容如下：
'Dear developer,
We have discovered one or more issues with your recent binary submission for "悠悠电台". Before your app can be reviewed, the following issues mus ...
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor whiteColor];
UIView * viewTest=[[UIView alloc] initWithFrame:CGRectMake(50, 50, 200, 200)];
viewTest.backgroundCo ...
app尺寸，去掉状态栏
CGRect r = [ UIScreen mainScreen ].applicationFrame;
r=0，20，320，460
屏幕尺寸
CGRect rx = [ UIScreen mainScreen ].bounds;
r=0，0，320，480
状态栏尺寸
CGRect rect; rect = [[UIApplication sharedApplication] statusBarFrame];
iphone中获取屏幕分辨率的方法
CGRect rect = [[UIScreen mainScreen] bounds];
CGSize size = re ...
@implementation HDHostSleep
- (instancetype)init {
self = [super init];
if (self) {
NSArray *array = [[NSBundle mainBundle] loadNibNamed:@"HDHostSleep" owner:self options:nil];
self = array.lastObject;
}
return self;
}
- (void)showInView:(UIView *)view{
...