方法1:

CGRectlabelsize =[@"門店已接單，用戶取消訂單"boundingRectWithSize:CGSizeMake(SCREEN_WIDTH-150,2000)options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeadingattributes:@{NSFontAttributeName:Font(14)}context:nil];

state= [[UILabelalloc]initWithFrame:CGRectMake(CGRectGetMaxX(pate.frame) +6,10, labelsize.size.width,14)];

方法2:

- (void)viewDidLoad {

[super viewDidLoad];

//獲取字符串的寬度

NSLog(@"獲得字符串的寬度:%f",[self widthForString:@"我愛你！我愛你！我愛你！我愛你！我愛你！我愛你！我愛你！我愛你！"fontSize:10.0 andHeight:10.0]);

//獲取字符串的高度

NSLog(@"獲得字符串的寬度:%f",[self heightForString:@"我愛你！我愛你！我愛你！我愛你！我愛你！我愛你！我愛你！我愛你！"fontSize:10.0 andWidth:10.0]);

}

#pragma -mark -functions

//獲取字符串的寬度

-(float) widthForString:(NSString *)value fontSize:(float)fontSize andHeight:(float)height

{

CGSize sizeToFit = [value sizeWithFont:[UIFont systemFontOfSize:fontSize] constrainedToSize:CGSizeMake(CGFLOAT_MAX, height) lineBreakMode:NSLineBreakByWordWrapping];//此處的換行類型（lineBreakMode）可根據自己的實際情況進行設置

returnsizeToFit.width;

}

//獲得字符串的高度

-(float) heightForString:(NSString *)value fontSize:(float)fontSize andWidth:(float)width

{

CGSize sizeToFit = [value sizeWithFont:[UIFont systemFontOfSize:fontSize] constrainedToSize:CGSizeMake(width, CGFLOAT_MAX) lineBreakMode:NSLineBreakByCharWrapping];//此處的換行類型（lineBreakMode）可根據自己的實際情況進行設置

returnsizeToFit.height;

}