NSString *name;
NSString *name;
- (void)applicationDidEnterBackground:(UIApplication *)application {
typedef NS_ENUM(NSInteger, UIButtonType) {
UIButtonTypeDetailDisclosure,
UIButtonTypeInfoLight,
UIButtonTypeInfoDark,
UIButtonTypeContactAdd,
};
struct CLLocationCoordinate2D {
CLLocationDegrees latitude;
CLLocationDegrees longitude;
};
textView.textViewShouldBeginEditing = ^(UITextView *textView){
return YES;
};
}
if (1 == 1) {//判断是否为真
//代码
}//判断是否为真
for (i=1; i++; i<=7)
for (i=1; i++; i<=NUM_DAYS_IN_WEEK)
CGRect frame = self.view.frame;
CGFloat x = CGRectGetMinX(frame);
CGFloat y = CGRectGetMinY(frame);
CGFloat width = CGRectGetWidth(frame);
CGFloat height = CGRectGetHeight(frame);
CGRect frame = CGRectMake(0.0, 0.0, width, height);
- (instancetype)init
{
self = [super init];
if (self) {
//代码
}
return self;
}
+ (instancetype)sharedInstance
{
static id instance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [[self alloc] init];
});
return instance;
}
//普通常量
static const NSTimeInterval ANIMATION_DURATION = 0.3;
//外部常量
extern const NSTimeInterval TYANIMATION_DURATION;
本文介绍了iOS应用进入后台时的处理方法,包括如何利用地理位置坐标、文本视图编辑及按钮类型的枚举定义等关键技术实现应用的平滑过渡。此外,还展示了如何初始化对象并使用单例模式来管理应用的状态。
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