iOS Lable根据文本数量动态设置frame

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这是.h里的代码

#import <UIKit/UIKit.h>

@interface NSString (size)

- (CGSize)sizeOfStringWithFont:(UIFont *)font width:(CGFloat)width;

- (CGSize)sizeOfStringWithFont:(UIFont *)font height:(CGFloat)height;

- (CGSize)sizeOfStringWithFont:(UIFont *)font width:(CGFloat)width limitlines:(NSInteger)limitlines;

+ (CGSize)sizeOfStringWithFont:(UIFont *)font;

@end

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

.m里边的代码

#import "NSString+size.h"

@implementation NSString (size)

- (CGSize)sizeOfStringWithFont:(UIFont *)font width:(CGFloat)width limitlines:(NSInteger)limitlines

{

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,0, width, CGFLOAT_MAX)];

label.numberOfLines = limitlines;

label.font = font;

label.text = self;

[label sizeToFit];

return label.bounds.size;

}

- (CGSize)sizeOfStringWithFont:(UIFont *)font height:(CGFloat)height

{

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0,0, MAXFLOAT, height)];

label.numberOfLines = 0;

label.font = font;

label.text = self;

[label sizeToFit];

return label.bounds.size;

}

- (CGSize)sizeOfStringWithFont:(UIFont *)font width:(CGFloat)width

{

return [self sizeOfStringWithFont:font width:width limitlines:0];

}

+ (CGSize)sizeOfStringWithFont:(UIFont *)font

{

NSString *text = @"近";

CGSize size = [text sizeOfStringWithFont:font width:CGFLOAT_MAX];

return size;

}

@end

调用

NSString *string = model.desc;

CGSize aSize = [string sizeOfStringWithFont:[UIFontsystemFontOfSize:TEXTFONT]width:kScreenWidth -20];

CGFloat titleHeight = aSize.height;

//问题描述frame

self.descriptionLable.frame =CGRectMake(10,10, kScreenWidth -20, titleHeight);

注意：字体大小和宽度这两个参数一定要传正确

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