iOS编程 NStimer的使用

NSTimer在非主线程中，要用NSRunloop而且要在新线程中开起要不会阻塞原线程

- (void)addRunloop
{

_moveTime=[NSTimer
scheduledTimerWithTimeInterval:nChangeTime
target:self
selector:@selector(animalMoveImage)
userInfo:nil
repeats:YES];

[[NSRunLoop
currentRunLoop] addTimer:_moveTime
forMode:NSDefaultRunLoopMode];

[[NSRunLoop
currentRunLoop] run];

_isTimeUp=NO;

}
- (instancetype)initWithFrame:(CGRect)frame
{

if (self=[super
initWithFrame:frame]) {

NSUInteger x=0;

NSThread *t=[[NSThread
alloc] initWithTarget:self
selector:@selector(addRunloop)
object:nil];
[t
start];

}

return
self;
}