我只是一个新手,所以不确定这是否是正确的地方。
我在你的网站上找到了这段代码来制作一个 xcode iphone 应用程序,其中背景颜色循环 - UIView backgroundColor 颜色循环
效果很好!我怎样才能调整它,使它只循环一次并以数组中的最后一种颜色结束?
谢谢你的帮助。
// ViewController.m
// colorCycle
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
[self doBackgroundColorAnimation];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void) doBackgroundColorAnimation {
static NSInteger i = 0;
NSArray *colors = [NSArray arrayWithObjects:[UIColor greenColor], [UIColor yellowColor], [UIColor orangeColor], [UIColor redColor], nil];
if(i >= [colors count]) {
i = 0;
}
[UIView animateWithDuration:2.0f animations:^{
self.view.backgroundColor = [colors objectAtIndex:i];
} completion:^(BOOL finished) {
++i;
[self doBackgroundColorAnimation];
}];
}