摘要：//通过imageView播放动画 //1.创建一个imageView UIImageView *imageView = [[UIImageView alloc] init]; imageView.frame = CGRectMake(0, 0, 320, 480); ... 阅读全文

摘要：UILabel *left = [[UILabel alloc] init]; left.text = @" Sent when the application is about to move from active to inactive state."; left.... 阅读全文

摘要：UILabel *label = [[UILabel alloc] init]; //根据内容动态计算label的高度 label.text = @"Sent when the application is about to move from active to ina... 阅读全文

摘要：CGFloat width = 40; CGFloat height = 40; //获取屏幕宽高 //获取屏幕对象 UIScreen *screen = [UIScreen mainScreen]; //获取屏幕大小 CGRect screenF... 阅读全文

摘要：#import "QFAppDelegate.h"@implementation QFAppDelegate//最后一个执行的初始化函数//主要做一些启动之前的初始化操作- (BOOL)application:(UIApplication *)application didFinishLaunchi... 阅读全文