知识库
加载一张图片
UIImageView *imageView =[[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];
imageView.image=[UIImage imageNamed:@"22.png"];
[self.view addSubview:imageView];
弹出窗口
NSString *msg = @"f*au*ck U";
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"message" message:msg delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil]; [alert show];
集成一个弹窗方法
NSString *a = [NSString stringWithFormat:@"group s %d",index];
[self alert:a];
字符串数字转换
1，字符串拼接
NSString *newString = [NSString stringWithFormat:@"%@%@",tempA,tempB];
2，字符转int
int intString = [newString intValue];
3，int转字符
NSString *stringInt = [NSString stringWithFormat:@"%d",intString];
解决中文乱码问题，POST也可以用，textfield也可以用的。
[NSString stringWithCString:[str UTF8String] encoding:NSUTF8StringEncoding];