Question

objective C设置背景颜色

[status setBackgroundColor:(NSColor *)]
还有个点语法，试过几次都报错，求大神指点下，看看错误在哪

能给点范例就非常感谢！

Answer 1

objective C设置背景颜色可以直接通过代码修改View颜色实现，参考代码如下：
- (void)viewDidLoad
{

[super viewDidLoad];
UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0,self.view.frame.size.width, 300)];

view.backgroundColor=[self colorWithHexString:@"e26562"];
[self.view addSubview:view];
}
- (UIColor *) colorWithHexString: (NSString *)color
{

NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString]; // String should be 6 or 8 characters

if ([cString length] < 6)
{

return [UIColor clearColor];

}

// strip 0X if it appears

if ([cString hasPrefix:@"0X"])

cString = [cString substringFromIndex:2];

if ([cString hasPrefix:@"#"])

cString = [cString substringFromIndex:1];

if ([cString length] != 6)

return [UIColor clearColor];

// Separate into r, g, b substrings

NSRange range;
range.location = 0;
range.length = 2;

//r

NSString *rString = [cString substringWithRange:range];

//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];

//b
range.location = 4;

NSString *bString = [cString substringWithRange:range];

// Scan values
unsigned int r, g, b;

[[NSScanner scannerWithString:rString] scanHexInt:&r];

[[NSScanner scannerWithString:gString] scanHexInt:&g];

[[NSScanner scannerWithString:bString] scanHexInt:&b];

return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

Answer 2

status不知道你这个是什么，如果你要对UIWindow进行设置的话，建议self.window.backgroundcolor=[uicolor redcolor],如果是对一个uiview设置背景颜色，就是uiview.backgroundcolor=[uicolor redcolor]，谢谢

Answer 3

如果你要对UIWindow进行设置的话，建议self.window.backgroundcolor=[uicolor redcolor],如果是对一个uiview设置背景颜色，就是uiview.backgroundcolor=[uicolor redcolor]，